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Varicella-zoster virus, shingles and postherpetic neuralgia

Ann Shuttleworth, BA.Freelance Health JournalistShingles is an acute unilateral and segmental inflammation of the dorsal root ganglia. It is caused by a reactivation of the chickenpox virus (varicella) some time after the primary infection. Most patients recover fully, except for possible scarring. However, a few continue to suffer pain after the shingles rash has healed. This is known as postherpetic neuralgia.

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